After much deliberating, I've placed an order. Naughty, because I'm moving soon and that will be costly!
But, there's a 0% finance off on Apple.com UK right now, so £69/mo for a laptop I've been wanting for so long is too good to miss (I don't do credit cards). That 0% offer ends 11th August by the way.
Ordered the 16gb, 512, in silver. Been wanting the silver for a long time too, having come from a space grey MBP.
Like I say, kind of bad of me to order this at a time when I'm moving but hopefully the £69/mo won't be too much of an impact! Definitely wouldn't have paid out £1700 cash though.